Last piers for the Mackinac Bridge

Piers No 29, 30, and 31 were the last of the marine foundations before reaching the causeway at the north end of the bridge, Electronic reproduction of text.  The Mackinac Bridge 1954 - 1958. Mackinac Bridge Authority
Abstract/Description: Piers No 29, 30, and 31 were the last of the marine foundations before reaching the causeway at the north end of the bridge
Subject(s): Bridges--Design and construction
St. Ignace (Mich.)
Mackinaw City (Mich.)
Mackinac Bridge (Mich.)
Date Created: 1955 (approximate)